Multiple choice

$( (10.998)^2 + (16.221)^2 - (14.441)^2 = ? )$ What approximate value will come in place of the question mark(?) in the following equation? (You are not expected to calculate the exact value).

  1. 300

  2. 120

  3. 360

  4. 240

  5. 180

Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Round: 10.998 to 11, 16.221 to 16.2, 14.441 to 14.4. Calculate: 11² + 16.2² - 14.4² = 121 + 262.44 - 207.36 = 176.08. This is closest to 180 among the given options.